致密复合膜在分离过程中的“Trade-off”现象是限制其发展的瓶颈，在保证分离层完整性的前提下构建具有选择分离性的促进传质通道为解决这一问题提供了新途径。本申请采用氧化石墨烯作为构筑基元，根据分离对象对其接枝改性，利用分子自组装技术将其与功能性材料进行层层组装，通过控制组装条件对氧化石墨烯的层间距及层间功能材料进行调控，从而构筑可供有机物优先快速通过的传质通道，实现同步提高选择性和渗透性的目的。同时，氧化石墨烯的限域作用可有效抑制层间功能材料的过度溶胀，从而提高多层膜的稳定性。本研究将借助现代分析手段揭示氧化石墨烯层叠膜在平面和非平面多孔支撑体上的生长及结构演变规律，并研究功能化氧化石墨烯、层间聚合物与分离有机物之间的分子作用机制，为同类具有限域传质通道复合膜的组装提供新思路。

“Trade-off” phenomenon is a key issue for preparation and application process of dense composite membrane. In order to solve this problem, the separation layer could be constructed with a mass transport channel, which has selective capability. In this application, graphene oxide was used as basic cell to form stacked membrane. The graphene oxide nanosheets were modified according to the separating mixtures, and then assembled with functional materials to form multilayer membrane. The layer spacing and functional materials can be controlled by changing the assembly conditions. Therefore, a mass transport channel can be formed to allow organic molecules pass through. Then, a membrane with high selectivity and permeability can be obtained. Meanwhile, the restricted effects of graphene oxide make the membrane suppress the excessive swelling of functional materials, which can improve the stability of the membrane. The variation of growth and structure of the graphene oxide stacked membrane on planar and non-planar porous support can be revealed by modern analytical tools. The interaction mechanism between functional graphene oxide, polymer in layer and organics to be separated will be investigated. The research could provide a new method for preparing composite membrane with facilitate mass transport channel.